I probably should have mentioned this earlier, but Lisa Randall--famous string theorist from Harvard, and author of Warped Passages--gave a general public lecture yesterday here and is giving a slightly more technical lecture today. Here was the flyer for yesterday's expensive (best seats were $30!) lecture:http://artslectures.ucsc.edu/ARTISTPAGES/Randall.htm

The nice thing about today's lecture is it's free... they just don't advertise it as widely since it's intended more for physicists (although I assure you, nobody will notice if you just casually show up... it's most likely going to be a huge crowd.) It's at 4pm today, so if you happen to be on campus you might want to check it out. More info:

Speaker: Lisa Randall Physics Department, Harvard University

Title: Relaxing to Three Dimensions

Abstract:

Extra dimensions of space might be present in our universe. Ifso, we want to know "How do dimensions hide?" and "Whyare three dimensions special?" I'll give potential answersto both these questions in the context of localized gravity.